Add latest changes from gitlab-org/gitlab@13-3-stable-ee

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/banzai/filter/inline_alert_metrics_filter.rb b/lib/banzai/filter/inline_alert_metrics_filter.rb
new file mode 100644
index 00000000000..a6140d1ac81
--- /dev/null
+++ b/lib/banzai/filter/inline_alert_metrics_filter.rb
@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+module Banzai
+  module Filter
+    # HTML filter that inserts a placeholder element for each
+    # reference to an alert dashboard.
+    class InlineAlertMetricsFilter < ::Banzai::Filter::InlineEmbedsFilter
+      include ::Gitlab::Routing
+      # Search params for selecting alert metrics links. A few
+      # simple checks is enough to boost performance without
+      # the cost of doing a full regex match.
+      def xpath_search
+        "descendant-or-self::a[contains(@href,'metrics_dashboard') and \
+          contains(@href,'prometheus/alerts') and \
+          starts-with(@href, '#{gitlab_domain}')]"
+      end
+
+      # Regular expression matching alert dashboard urls
+      def link_pattern
+        ::Gitlab::Metrics::Dashboard::Url.alert_regex
+      end
+
+      private
+
+      # Endpoint FE should hit to collect the appropriate
+      # chart information
+      def metrics_dashboard_url(params)
+        metrics_dashboard_namespace_project_prometheus_alert_url(
+          params['namespace'],
+          params['project'],
+          params['alert'],
+          embedded: true,
+          format: :json,
+          **query_params(params['url'])
+        )
+      end
+
+      # Parses query params out from full url string into hash.
+      #
+      # Ex) 'https://<root>/<project>/metrics_dashboard?title=Title&group=Group'
+      #       --> { title: 'Title', group: 'Group' }
+      def query_params(url)
+        ::Gitlab::Metrics::Dashboard::Url.parse_query(url)
+      end
+    end
+  end
+end